S60 sedan and V60 wagon models come in several trims and all are powered by some version of a 2.0L turbocharged 4-cylinder engine. In its T5 guise, the engine makes 240 horsepower and 258 pound-feet of torque. The T6 variant employs both a turbocharger and a supercharger, which brings output up to 302 horsepower and 295 pound-feet. Polestar is Volvo's performance tuning partner, and in the performance-oriented S60 and V60 Polestar trim, the engine puts out 362 horsepower and 347 pound-feet of torque. These engines get good mileage, too--up to an EPA-rated 25 mpg city and 37 highway for the T5....